Home / 1,561.83-2,154.43-1,030.80

Finding the Fourth Proportional to 1,561.83, 2,154.43 and 1,030.80

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Solution

The fourth proportional to 1,561.83, 2,154.43 and 1,030.80 is: 1,421.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.83 : 2,154.43 = 1,030.80 : x
  2. Step 2: Convert to fraction form
    1,561.83/2,154.43 = 1,030.80/x
  3. Step 3: Cross multiply
    1,561.83x = 2,154.43 × 1,030.80
  4. Step 4: Simplify right side
    1,561.83x = 2,220,786.44
  5. Step 5: Solve for x
    x = 2,220,786.44/1,561.83
  6. Step 6: Final answer
    x = 1,421.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.